CutSizeGenie is a Shopify app for fashion and apparel e-commerce brands that unlocks revenue from out-of-stock sizes using virtual inventory and size mapping. It improves size availability on Shopify product pages without theme edits.
Guides

Merchant-ready guides (Docs-lite) for CutSizeGenie.

Practical, operations-friendly guidance for Shopify fashion brands using size mapping and virtual inventory to unlock revenue from out-of-stock sizes.

Install from Shopify → Read FAQ
Guide 01

Setup checklist (under 30 minutes)

Use this quick checklist to go from install → first mapping → first safe virtual order.

  1. Install the app from the Shopify App Store and complete permissions.
  2. Pick a pilot scope: start with 10–50 hero SKUs (high traffic, high intent, size-led).
  3. Define mappings like S → M, L → XL based on your tailoring/cut-size capability.
  4. Set safety thresholds: decide minimum stock where source size should stop sharing.
  5. Set max-share caps: cap how many units can be virtually allocated per mapping.
  6. Enable for a single location (optional) if you manage DC vs retail separately.
  7. Monitor virtual logs for the first day to ensure ops clarity.
  8. Expand scope once the warehouse is comfortable with the flow.
Best practice
Roll out conservative settings first (higher thresholds, lower caps). You can always expand once ops confidence is high.
Guide 02

How to design size mappings (what actually works)

Mappings should mirror real-world alteration feasibility and not “theoretical” size similarity.

Common fashion mappings
  • S borrows from M
  • L borrows from XL
  • XXL borrows from XL (only if feasible)
  • Kids sizes: adjacent mapping if patterns allow
Avoid risky mappings
Avoid mappings where alteration increases complexity, damages margin, or increases returns. If in doubt, exclude that collection or keep caps very low.
Rule-of-thumb
If your ops team can’t confidently fulfil that mapping within your promised SLA, don’t enable it.
Guide 03

Safety: thresholds, caps, and “no-oversell” behavior

CutSizeGenie is built to avoid uncontrolled overselling by using conservative guardrails.

  • Threshold: “Stop sharing if source size falls below X.”
  • Cap: “Never allocate more than Y units virtually.”
  • Scope: Enable only for categories where alteration/cut-size is allowed.
Example setup (safe default)
For a hero SKU where M has 20 units: set threshold 6–8 units and cap 4–6 virtual units initially. Tune later using real order behavior and ops capacity.
Guide 04

Operations workflow: what your warehouse should do

Virtual inventory works best when ops has a simple SOP.

  1. Identify virtual orders from CutSizeGenie logs/tags (as configured).
  2. Pick the mapped source size (jump size) from inventory.
  3. Process alteration/cut-size per SOP.
  4. Pack and ship under normal Shopify fulfilment flow.
Guide 05

Measure impact: conversion rate + ROAS

CutSizeGenie typically helps where paid traffic lands on PDP and drops due to size unavailability.

  • Track PDP conversion rate (mapped SKUs vs non-mapped SKUs)
  • Track ATC rate changes on mapped collections
  • Track ROAS changes on campaigns landing on mapped PDPs
  • Monitor return rate (ensure mappings don’t increase returns)

Want a guided onboarding?

We can help you design safe mappings and rollout strategy for your category.

Email us → See Taruni case study
Guides index
Start here
01 — Setup checklist 02 — Design mappings 03 — Safety rules 04 — Ops workflow 05 — Measure impact
Install → Glossary FAQ
CutSizeGenie Guides page. Guides for Shopify merchants about size mapping, virtual inventory, out-of-stock sizes, safety thresholds, max-share caps, operations workflow, and measuring conversion rate and ROAS impact for fashion and apparel brands.